技術標籤：QT基礎到高階c++基礎到高階c基礎到高階

#include <QSettings >
//建立配置檔案
    QSettings iniFile("./test.ini", QSettings::IniFormat);
    //寫入資料
    iniFile.setValue("/setting/value1", 1);
    iniFile.setValue("/setting/value2", 2);
    iniFile.setValue("/log/value3", 3);


     //讀取資料
 

    QString value1=iniFile.value("/setting/value1").toString();
    qDebug() << value1;


    QString value2=iniFile.value("/setting/value2").toString();
    qDebug() << value2;

效果如下圖：

//#include <stdio.h>
    FILE* fp;
    fp = fopen("./test.ini", "r+"
 
);


    if(fp == NULL){
        printf("fopen error");


    }


    while(!feof(fp)){
        char rr[50] = {'\0'};


        if(fgets(rr, 50, fp) != NULL){
            printf("rr = %s\n", rr);
        }
        else{
            printf("rr is NULL");
        }
    }


    /* 列印結果
    * rr = [setting]
    * rr = value1=1
    * rr = value2=2
    * rr =
    * rr = [log]
    * rr = value3=3
    * rr is NULL
    */
 

//#include <stdio.h>  #include <string>
    FILE* fp;
    fp = fopen("./test.ini", "r+");


    if(fp == NULL){
        printf("fopen error");


    }


    while(!feof(fp)){
        char rr[50] = {'\0'};


        if(fgets(rr, 50, fp) != NULL){
//            printf("rr = %s\n", rr);


            std::string str(rr);
            int ipos = str.find_first_of("=");
            printf("ipos = %d\n", ipos);


            if(ipos == -1) continue;
            char r1[10], r2[10];
            memcpy(r1, rr, ipos);
            memcpy(r2, &rr[ipos+1], strlen(rr) - ipos);
            printf("r1 = %s\n", r1);
            printf("r2 = %s\n\n\n", r2);
        }
        else{
            printf("rr is NULL");
        }
    }


    /* 列印結果
    * ipos = -1
    * ipos = 6
    * r1 = value1
    * r2 = 1
    *
    * ipos = 6
    * r1 = value2
    * r2 = 2


    * ipos = -1
    * ipos = -1
    * ipos = 6
    * r1 = value3
    * r2 = 3


    * rr is NULL
    */